## Summary
Reuse the actionbar queue-button page object in the queue mode E2E tests
so dropdown selectors live in one helper.
## Changes
- **What**: Adds queue mode menu/item helpers to
`ComfyActionbar.queueButton` and updates `queueButtonModes.spec.ts` to
use them.
- **Dependencies**: None.
## Review Focus
This is stacked on #11209 and should be reviewed as a test-infra cleanup
only; the behavior covered by the spec is unchanged.
┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-11927-test-reuse-queue-button-page-object-in-e2e-3566d73d365081918d59c2d587c4c94a)
by [Unito](https://www.unito.io)
## Changes
Add Playwright E2E tests for queue button modes in the topbar (6 tests):
- Run button visibility in topbar
- Queue mode trigger menu visibility
- Opening the mode menu via trigger click
- Verifying available modes are shown as menu item radios
- Menu closes after selecting a mode
- Run button sends prompt when clicked (via intercepted `/api/prompt`
route)
## Test
```bash
pnpm test:browser:local -- browser_tests/tests/queueButtonModes.spec.ts
```
┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-11209-test-add-E2E-tests-for-queue-button-modes-3416d73d365081a5bf10f8b9c6bdc2a7)
by [Unito](https://www.unito.io)
---------
Co-authored-by: Benjamin Lu <benjaminlu1107@gmail.com>
